I'm timed please help

Write the ratio of corresponding sides for the similar triangles and reduce the ratio to lowest terms.

2 similar triangles. Triangle 1 has side lengths 14, 21, blank. Triangle 2 has side lengths 18, 27, blank.

a.

14/27= 21/28= 14/27

b.

14/18=21/27=7/9

c.

14/21= 18/27=2/3 E

d.

27/14 =28/21=27/14