Which of the following is correct?

A) The cause and effect relationship remains the focus of scientific investigation

B) The cause and affect relationship remains the focus of scientific investigation

 C) The cause and affect relationships remain the focus of scientific investigation

D) None of these

Which of the following is correct?

A) Majority of the speakers is in favour of the motion

B) Majority of the speakers are in favour of the motion

C) Majority of the speakers were in favour of the motion

D) None of these

He had heard the story many times and as many times?

A) has felt such melancholy that he thought his eyes will water

B) had felt such melancholy that he thinks his eyes would water

C) had felt such melancholy that the thought his eyes would water

D) None of these