more than 1 answer could be correct

I A junior analyst for a pharmaceutical company wants to test the cholesterollowering effect of a drug that the company recently wants to launch on the market as a replacement for an existing product. To do this. he/she wants to verify that the cholesterol values taking the new drug are significantly lower than taking the current one. How would you design the hypothesis testing? C] It is obvious that this is a test of paired data defining an alternative hypothesis as ulold_drug} > plnew_drug} C] In this hypothesis testing we can have a balanced design (n1: n2). but it is not necessary to do so. C] It is obvious that this is an independent data test defining an alternative hypothesis as plold_drug} i=- plnew_drug) C] There should be a control group and a treated group, and in the control group it would be advisable to give a placebo-type drug (inactive substance or other intervention that looks the same and is administered in the same way as the active drug or treatment being tested)