Can someone answer this question? Its a wjec AS chemistry question. The experiment is a titration

Drug abuse will not lead to physical and psychological dependence. true or false ?

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

Which statement would indicate the presence of an acid