Read the following paragraph and determine if the hypothesis is true:

William Thomas Harris (December 3, 1931 May 28, 2011) was a Canadian pitcher in Major League Baseball who played for the Brooklyn and the Los Angeles Dodgers teams. Listed at 5 ft , 187 lb , Harris batted left-handed and threw right-handed. Born in Duguayville, New Brunswick, he attended Dorchester School.

Available options:
a). Yes.
b). It's impossible to say.
c). No.
Hypothesis: William Thomas Harris moved to the USA when he was 20 years old
b).