Necessary and possession in a sentence

What sentence correctly uses it’s underlined relative pronoun?

Which statement most strongly develops a positive tone? a. i was happy when i received my first paycheck for my hand work. b. winter break is approaching quickly, and i cannot wait to go shopping for gifts. c. going to the beach is one of my favorite activities; i love surfing and paddle boarding. d. a sense of accomplishment overwhelmed me as i stepped into into the stage that sunny, glorious day of graduation.

Which statement is true? a) a diverse workplace can cause people to be come prejudiced b) cultural barriers can pose a challenge to creating a diverse workplace. c) enforcing the use of english challenged in creta diverse workplace d) people who see resistant to change embrace diversity easily