Answer:
Creo que.
Step-by-step explanation:
The phrase that best fits the sentence is: "Creo que el actor es de Venezuela." Since, for:
Option A should be: "No es posible que el actor sea de Venezuela"
Option B: "Dudo que el actor sea de Venezuela"
And option C does not fit at all with any part of the rest of the sentence.
I hope I could help you, good luck!