Answer:
b.
Explanation:
The first sentence makes it seem as though the yeast is being rolled out instead of the dough, since it does not use commas on either side of "activated by yeast". The correction in option "b." makes it clear that the dough is being rolled out while also specifying that it is yeast-activated dough.
B - Climax
Climax means '<span>the most intense, exciting, or important point of something; a culmination or apex.' </span>
<span>Sue admires her friend's excellent SINGING.
The gerund is used as a noun.</span>