Your question is incomplete because it does not provide the underlined portion. The complete sentence is:
Although Terry liked to run in the rain she wasn't so sure about jogging in a monsoon
Answer:
D) rain, she
Step-by-step explanation:
The sentence given is a complex sentence because it contains a subordinate clause beginning with a subordinating conjunction, although, and an independent clause. In that respect, the dependent clause is located at the beginning of the sentence, so both clauses can be separated with a comma.
The other options are incorrect because they separate independent clauses in compound sentences.