The correct answer is B) A dreamer can also be a doer
Step-by-step explanation:
A clause contains a subject and a predicate. Additionally, clauses are independent if they express a complete idea or dependent if they require another clause to be complete. The clause "A dreamer can also be a doer" is the only independent clause because this contains the subject "a dreamer", the verb "be" and expresses a complete idea or thought.
On the other hand, the subordinating conjunctions "although", "if" and "when" in other options show the clauses are dependent because these words suggest there is more information and another clause is required, for example, the word "if" suggests a consequence or condition.