This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to make vegetarian pho
Char or broil the onion and ginger until lightly blackened.
Grab 1-2 pieces of onion and ginger with tongs and hold them over an open flame until they've blackened slightly. Place the charred pieces on a plate and pick up a few more pieces with your tongs.

Pick your answer from:
[A]. Continue in this way until you've charred all of the onion and ginger. To broil, place the onion and ginger in a shallow pan and slide the pan under your broiler.;
[B]. Place the grill over medium heat and let the onions and ginger get a nice brown. When the onions are charred, remove them from the grill and use them for sake sake.;
[C]. Toss them over medium heat to continue the flavoring process. Wait for approximately two to three minutes for the onion and ginger to smoke.;
[D]. You can melt the ginger chunks further by dropping them in a large frying pan over medium-high heat and smoking them for 10 to 15 minutes. The pieces should have turned a somewhat deep red.;
The answer is:
[A].