Two sources, S1 and S2, emit light of identical wavelength and phase. The light from the two sources arrives at the same

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Two sources, S1 and S2, emit light of identical wavelength andphase. The light from the two sources arrives at the same point, P,on a screen. In terms of the distances from the source to thescreen d1 and d2, which of these options below allow forconstructive interference at P (where m is an integer)?
(Option A) d2 − d1 = ((m+1)/2)λ
(Option B) d2 − d1 = mλ
(C) d1 = md2
(D) d2/d1 = ((m+1)/2)λ
(E) d2/d1 = mλ
An explanation for which option is the correct answer and whythe other options are incorrect would be appreciated - thanks!