Question

Fill in the blank with a relative pronoun:
This is all _______ I wanted to say.

• A. whom
  
• B. whose
• C. that
• D. which

Answer 1

Answer: (C)

that

Since the object referred to has no gender, which is the speech, an impersonal relative pronoun should be used like "that", which also indicates a specific object. Hence, Option C is correct. The rest of the options do not refer to persons or an indefinite object, hence incorrect.