Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions

a) Sarah: Hi, Mark! I’ve been volunteering for wildlife conservation projects. It’s so rewarding to protect endangered species.
b) Mark: Hey, Sarah! You look so healthy! What’s your secret?
c) Mark: That’s amazing! I’m interested in supporting these causes too. How can I get involved?