If you know what Dr. Jekyll and Mr. Hyde is about, then the answer is quite simple - the correct option is D. psychopathology. Psychopathology is the study of mental disorders. Psycho means soul, pathos means suffering, and logos means study, so it is literally the study of why your soul suffers. Dr. Jekyll has a certain mental disorder which enables his evil counterpart/other personality, Mr. Hyde to come out, similarly to Bruce Banner and Hulk.
Disadvantages: You can be cyberbullied. You can get lost. People can hack you. You can be constantly SPAMed. Advantages: You can access info quickly. You can get ideas from others online. You're able to communicate faster. You can make more friends.
A Part to Represent a Whole. A synecdoche may use part of something to represent the whole. It's actually very common in the English language for part of something reference the whole. For example: The word "sails" is often used to refer to a whole ship. The phrase "hired hands" can be used to refer to workers.
