Find the mistake: Before creating the telegraph, Samuel Morse made their living as a painter.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions

Question:

Find the mistake: Before creating the telegraph, Samuel Morse made their living as a painter.

• 
  A.
  creating
• 
  B.
  their
• 
  C.
  as
• 
  D.
  a