Which of the following is NOT one of the four primary tastes

A)  sour
B)  spicy 
C)  salty
D)  sweet

Which of the following exemplifies a "two-person career"?

A) A family business allows parents to alternate work and child care.
B) A couple recognizes homemaking as an important job and share the work.
C) A wife is an unofficial contributor to her husband's work.
D) None of these answers is correct.

One of the main symptoms of Parkinson's disease is

A) impairment of initiating voluntary movement.
B) sudden fits of falling asleep in the middle of the day.
C) severe, sudden attacks of anxiety.
D) inability to understand spoken language.