The correct option is B Obtains food through general surface.
Tapeworms in general have no digestive tract. Tapeworms lives inside the host intestine from there it absorbs digested food. On the outside of their bodies tapeworms have a skin like covering tough enough to withstand being dissolved by digestive juices and porous enough to allow tiny bits of food to pass through which are already digested by host enzymes. So the correct answer is 'obtains food through general surface'.