Question 50: Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions: Measles are a very contagious disease that can spread through contact with infected mucus and saliva.
Answer A. are → is
Because measles (n) is measles – a singular noun
Measles is an infectious disease that spreads easily through contact with infectious fluids, for example
such as saliva or nasal secretions from an infected person.