GMAT Sentence Correction (SC) | Re: Most efforts to combat such mosquito-borne diseases like

Split1) Parallelism when doing comparison. "such….as" is correct. "such…like" is incorrect. You can use like as an option to list items similar to the use of the word such. The issue is that you cannot use like and such in a same sentence. Either or. A & B are out.

Split2) Comparison. "either on x or on y" or "on either x or y" are correct. C and D are out. To add to this. D and E are not parallel in the way they present.."vaccinating...extermination"
...

---