Conferences should be handled:

A: According to written policies
B: Formally or informally, as preferred
C: By supervisors, not classroom teachers
D: As appropriate for the topic and concern
E: In a public classroom setting

I think its A- According to written policies

Explanation:

I think that because you should always follow workplace rules. hope it helps

D: As appropriate for the topic and concern

Explanation:

The main essence of any conference is to close a knowledge gap in the area or discipline or topic in which the conference is set out to educate like minds on.

the answer will be a) proteins i believe

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion