Please help me with this biology taxonomy question.?

Question

Which of the following traits do archaea and bacteria share?

1. composition of the cell wall
2. presence of plasma membrane
3. lack of a nuclear envelope
4. identical rRNA sequences


a. 1 only
b. 3 only
c. 1 and 3
d. 2 and 3
e. 2 and 4

I know that 3. lack of a nuclear envelope has to be one of the answers

Answer 1

I think it is D, because they are both prokaryotes, and have plasma membranes but do not have compartmentalization, or a nuclear envelope.

Answer 2

They also each have a plasma membrane - that's fairly essential to all cells.