MEXICO CITY, May 11 (Reuters) - OHL Mexico said that it accepted the resignation of an official featured in secret recordings leaked last week, the company said on Monday. The official, Pablo Wallentin, was heard discussing a hotel reservation for an official from the government of the State of Mexico in one of the recordings. (Reporting by Ana Isabel Martinez)
Can we infer the following?
Wallentin is not the most recent official to occupy his post.

Available choices: a). Yes. b). It's impossible to say. c). No.
The answer is: