Which of the Following Applies to the Language-Producing Dominant Hemisphere

Which of the following applies to the language-producing dominant hemisphere of the brain?

A) Ninety-seven percent of right-handed people process speech from the left hemisphere.
B) Ninety-eight percent of left-handed people produce speech from the left hemisphere.
C) The language-producing dominant hemisphere cannot be positively determined through the observation of hand position while writing.
D) The language-producing dominant hemisphere can be determined only by briefly anaesthetizing one cerebral hemisphere at a time.