Can we draw the following hypothesis from the context (see options)? 

Context:

Thus, China's President repeatedly sent letters and envoys to the Dalai Lama and to the Tibetan Government asking that Tibet "join" the Republic of China.

Hypothesis: The Dalai Lama was unsure if he wanted to join China. 
OPTIONS: a. Yes. b. It's impossible to say. c. No.
b.