10. If a crest is analogous to a compression then:
A. a crest is also analogous to a trough
B. acrest is also analogous to a rarefaction
C. a trough is analogous to a rarefaction
D. a trough is also analogous to a compression
10. If a crest is analogous to a compression then:
A. a crest is also analogous to a trough
B. acrest is also analogous to a rarefaction
C. a trough is analogous to a rarefaction
D. a trough is also analogous to a compression