Waves that are emitted in phase from two sources will undergo destructive interference when the paths from the sources differ by
A)
an odd half-integer number of wavelengths.
B)
a whole integer number of wavelengths.
C)
an odd one-third-integer number of wavelengths.
D)
any quarter-integer number of wavelengths.
E)
none of the above.
A
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Fill in the blank(s) with the appropriate word(s).