Which of these is an incorrect use of parallel structure?
A.) I have to remember to pack my flashlight, hiking boots, and extra socks. 

B.) To get to the campground, go four miles, turn left, and look for the blue sign.

C.) My grandfather teaches us to catch fish, build fires, and read maps. 
D.) Our family loves camping because we hike, roast marshmallows, and tents.