2013 L2 Kaplan Schweser Practice exam Vol.2

2013 L2 Kaplan Schweser Practice exam Vol.2, page 65, question 113

I have a question here, if stock has a reverse split (one for two), I understand conversion ratio of convertible bond would be half, but how about the market conversion price of the convertible bond? I think it should be doubled and choice B is also correct. Thanks.