Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Holding all other factors constant, the most likely effect of low demand and heavy new issue supply on bond yield spreads is that yield spreads will:
Option A:widen.
Option B:tighten.
Option C:not be affected.

Answer: A