The ”oath” referred to in the scene is?

Read the extract and answer the question

Look thou be true. Do not give dalliance
Took much the rein. The strongest oaths are straw
To the fire I’ the blood. Be more abstemious.
Or else, good night your vow!

(Act IV, scene one lines 51-54)

A. Miranda shall not give in to Ferdinand
B. Ferdinand shall not have intimate contact with Miranda
C. Miranda shall vow to be faithful to Ferdinand
D. Ferdinand shall not tell his father about Miranda

Correct Answer:

Option B – Ferdinand shall not have intimate contact with Miranda