Question

Which of the following options best summarizes the author‘s main point in the passage?

• A. Several recent breakthroughs have increased our understanding of the causes of lightning.
• B. Charge polarization in clouds can result both from the freezing of super cooled droplets and from the modification of ion properties.
• C. The standard explanation of the causes of lightning is inaccurate and should be modified.
• D. Scientists are not yet agreed on either the causes of cloud-to-ground lightning or the methods of controlling it.
• E. To argue in favour of one model of polarization process

Answer 1

The correct option is D Scientists are not yet agreed on either the causes of cloud-to-ground lightning or the methods of controlling it.

The three given paragraphs represent three different views by scientists which have not been distinctly proven. The author has made a summary note of each and tried to present as many varied opinions/views as possible. Hence we can comfortably select option (D) as the answer.