Your question is missing the options. I've found the complete question online. It is as follows:
José is a widely sought-after speaker on the topic of environmental pollution. He’s written numerous books on the topic and is always seen as the “go-to” guy by news channels when the topic surfaces. What is José?
a) thought leader
b) innovator
c) business strategist
d) rhetorical expert
e) intellectual capitalist
Answer:
José is a thought leader.
Explanation:
From the description offered in the question, we can see that José is a thought leader. A thought leader is a person - it can also be a firm - who is regarded as an authority in a certain field, being sought and rewarded for his/her expertise. Thought leaders are obviously very influential, their opinion being respected and consulted as often as possible when it comes to that specific field.