Jim Cramer answers Twitter questions on whether Caterpillar can hit $100 following today's move to the upside. Cramer is also asked about Apple earnings and his answers hinges on China Mobile. Another Twitter follower asked whether Cramer would choose Facebook over Twitter for a stock buy. Cramer explains why he prefers Facebook stock over Twitter stock, even though Twitter has several positive points. If you have a question for Cramer tweet him using #CramerQ and he may answer your question from the NYSE!