In each question, a sentence is written in four different ways. Choose the option which gives the most effective and grammatically correct sentence. Pay attention to grammar, word choice and sentence construction.

A. Pele, whom many people consider is the greatest footballer of all times, represented Brazil in four World Cups.

B. When the news about the decline in the quarterly sales of the product broke out, it was difficult to say who the company would hold responsible for this disaster.

C. When the tension with the business partners increased, Mr. Singh decided to visit them personally and talk to whomever is willing to sort the discord

D. Who do you think was supposed to meet Mr. Brown from the news bureau, the well-known author, during his week-long visit to Delhi?

Please do not use chat terms. Example: avoid using "grt" instead of "great".