In large number of words, when British English uses the /a:/ sound, American English uses the ……… sound

In large number of words, when British English uses the /a:/ sound, Am

1.	In large number of words, when British English uses the /a:/ sound, American English uses the ……… sound
A.	/ æ /
B.	/ a: /
C.	/ Λ /
D.	/ ʒ: /
Answer» B. / a: /