B. If it rains is a subordinate clause
I believe it is C. Conflict.
Answer:
(Margaret Knight was born in 1838 in Maine, where she designed kites and sleds for her siblings. She later came up with a paper bag folding and gluing machine, which allowed her to open her own paper bag company. The success of this company led her to invent more, receiving 26 patents, which caused many to call her the "female Edison.")
