Which ranks fall under the category 'LCDR and Below'?

The category "LCDR and Below" specifically includes all ranks that are equal to or lower than the rank of Lieutenant Commander (LCDR). This encompasses the ranks of Ensign, Lieutenant Junior Grade, Lieutenant, and Lieutenant Commander. The designation focuses on the levels of leadership and command authority, with LCDR being a pivotal rank within the officer corps before advancing to Commander. Understanding this structure is important for recognizing the hierarchy within the military and the responsibilities assigned to different ranks.

The other choices include ranks that are above or completely separate from the LCDR designation, which is why they do not fit into the "LCDR and Below" category, confirming that the correct choice accurately identifies the ranks in question.