A. she is still alive but sleeping. It is after this that Romeo takes poison to in order to 'join her' out of grief.
A subordinating conjunction introduces a dependent clause in a complex sentence.
Here is an example:
I checked my emails when I arrived home.
The clause <em>I checked my emails </em>is independent, and <em>when I arrived home </em>is dependent, and it starts with a subordinating conjunction <em>when.</em>
B is the answer because progressive means present tense.
