Help with English please

Which would be the most credible source for researching the effects of smoking? letter from your grandfather web page about someone’s lung cancer report prepared by a tobacco company research article in a scientific journal

Fill in the blank: modernism can be seen in movies with (choose the best answer a. a technological and scientific view b. a fantasy type twist c. an anti-consumerism slant d. a realistic and non-imaginative slant

Identify how chekhov’s background and beliefs may have influenced his short story “the bet”.