Need an answer in 10 minutes. Sorry for being so difficult thank you in advance!

Two beams of laser light, which have the exact same wavelength but differ in regards to phase, are directed at a double slit. Each beam is incident on one slit, as shown in the diagram below. The two slits subsequently act as sources of the waves, which spread out semi-circularly from the slits and interfere with each other. B C E H-1 D The blue and red lines represent the crests of the electromagnetic waves, with the midpoint between them representing the troughs. Given this information, at which of the five labeled points will completely constructive interference occur? Select all that apply