41. What is the article mainly about? (A) The world needs to work together to develop tests, treatments, and vaccines for the coronavirus as quickly as possible. (B) The Bill and Melinda Gates Foundation is optimistic about progress in fighting poverty and improving global health. (C) COVID-19 has pushed 37 million people into extreme poverty and set vaccinations back 25 years. (D) Vaccination rates have increased 25 times since the coronavirus pandemic started 25 weeks ago.