English Language · Sentence Rearrangement

The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. P. Adapted by scientists for laboratory use as a molecular biology tool, CRISPR has greatly reduced the time and cost associated with gene editing in a broad range of organisms. Q. CRISPR gives researchers the ability to more easily add, remove, or change regions of an organism's DNA. R. CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats and it is a naturally occurring genetic feature of bacteria used to fight invading viruses. S. Genetic engineering is not new—the capability to manipulate human DNA, and the associated ethical concerns, have been around since the 1970s.