According to the explanation given in the passage, which of the following causes superbubbles to gradually assume the shape of a chimney？
A．The gravitational attraction of supernovas adjacent to the region of the chimney's formation
B．The effect of entropy on the relative abundance of hot interior gas within the superbubble
C．A chemical reaction involving ionized trace ions at the heart of the superbubble
D．A tendency toward coalescence in the gases that contribute to the formation of the superbubble
E．A natural buoyancy of the superbubble, which causes the chimney to stretch and become a gaseous conduit

Callable bonds are bonds in which______.
A．the borrower has the right to pay off all or part of the bond before the scheduled maturity date
B．the lender has the right to recall all or part of the bond's principal value before the scheduled maturity date
C．coupon payments can be suspended for a brief period of time
D．the issuer has defaulted

Which of the following statements is not true of accounting？______.
A．Accounting is language of business.
B．The user of accounting includes business, government, nonprofit organizations and individuals.
C．Accounting is an end rather than a means to an end.
D．Accounting is useful for decision making.

The author implies that an advantage of McClary's form. of musical criticism over that favored by the author is that it
A．tends to deny that some kind of contrast between masculinity and femininity will inevitably exist in any music
B．employs social values to account for the aesthetic choices involved a piece's composition more efficiently than the theory advocated by the author
C．re-inscribes models of gender difference for the most part identical to those it seeks to critique
D．pays closer attention to avant-garde music that may form. the model for non-gendered musical forms
E．carries assumptions that for the basis of a more politically responsible strategy for criticizing the gendering of music

The passage would be most likely to appear as part of
A．a book review summarizing an innovative new approach to analyzing the source of gender codes in music
B．an essay describing broad trends in the practice of musical criticism
C．a textbook on the application of new critical methods to older forms of music
D．a report to musicologists on the relationship between gendered music and the avant-garde
E．an article supplying reasons why the critic is just as important as the composer in establishing the gendering of a piece of music

External users of financial accounting information include all of the following except
A．suppliers
B．creditors
C．general public
D．line managers