The answer is c. suppress. Hope this helps.
It is effective when you are typing official things, like work documents, school papers, or important e-mails. People take you more seriously if you type things in correctly, and usually when you are typing, you make mistakes that you do not notice. Spell check fixes those mistakes so you don't have to maually go through your work.
Answer:
subject
Explanation:
because they tell what the subject is about
Answer:
the sharp decrease in rainfall has led to drought.
I feel B is the complex, compound sentence... I regret I cannot tell you why.