The best way to encourage innovative thinking is not to promise financial rewards for ideas, but to ensure that the person making the suggestion receives recognition for his contribution. Which choice make the sentence correct?
Select one:
a. but rather by ensuring that the person making the suggestion receives recognition for his contribution.
b. but to ensure that the person who makes the suggestion will be receiving recognition for his contribution.
c. but to ensure that the person making the suggestion receives recognition for his contribution.
d. but rather ensure that suggestion-maker receives recognition for his contribution.