A new human disease has been identified in which proteins normally secreted at the plasma membrane are trapped within the cytoplasm (apparently in anterograde transport vesicles). CDC Atlanta has proposed 6 different drugs that might be used to treat the disease. DRUG A increases the production of the protein clathrin, DRUG B ensures the proper formation of microtubules, DRUG C enhances ATP biosynthesis, DRUG D enhances GTP biosynthesis & DRUG E prevents Calnexin—Glycoprotein interaction. As the expert on cell biology, you have been asked to evaluate EACH drug for potential efficacy (i. e. could the drug POSSIBLY correct or treat the disease)