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

Context:

The 1982 Bavarian Tennis Championships was a men's Grand Prix tennis circuit tournament held in Munich, West Germany which was played on outdoor clay courts. It was the 66th edition of the tournament and was held form 17 May through 23 May 1982. Gene Mayer won the singles title.

Hypothesis: The 1982 Bavarian Tennis Championships was played on plastic courts
Choices:
--Yes;
--It's impossible to say;
--No;
No