What happens next in this paragraph?

How to prepare carne asada tacos
Heat the cooking oil, or lard in a skillet on medium-high.
Make the taco shells.
Use a pair of tongs to hold half of the tortilla under the oil for 1 to 2 minutes until the shell becomes slightly firm and golden brown in color.
Possible answers: a). Flip the tortilla over in the skillet and repeat. Set the shell over a paper towel with the closed side facing up so the excess oil can drain.. b). Drain and discard the shells and flip a taco when finished cooking. Spread the taco seasoning over the shell and season and serve with tortilla chips or rice.. c). Then remove half the tortilla and place it on a cutting board. Peel the tortilla and crimp it so it is loose enough to attach to the skillet.. d). Heat the other half of the tortilla. Depending on how thick you want the taco shells to be, you will need to heat them for a few minutes every 1/2 hour..
a).