The passage is saying VCRs are hurting Companies's business. How? By taking commercials out.

We need to strengthen this. I was not clear on option A, so kept it until the last.

(B) VCR manufacturers who advertise on television would themselves suffer the damage, if any, to advertisers’ interests that is caused by VCR’s. --> We are talking companies who are suffering not the VCR manufactures. Hence, OUT.

(C) There are VCR’s that are in the early stages of development that will automatically edit out commercials during the recording process. --> Could be a trap but this is talking about future. Conclusion is about present.

(D) Those who tape programs on VCR’s, but who do not edit out commercials when viewing the programs, tape more often than those who do edit out the commercials. --> Isn't it a weakener? Hence, OUT.

(E) Some television commercials are as entertaining or informative as the programs they interrupt. --> Irrelevant.

Since I rejected all the options but A, I can say answer is A.