Question

name a ray (just the letters)

Explanation:

Step1: Recall ray definition

A ray has one endpoint and extends infinitely in one direction.

Step2: Identify rays in figure

In the figure with points B, C, D, rays can be named as $\overrightarrow{BC}$ or $\overrightarrow{BD}$.

Answer:

$\overrightarrow{BC}$ (or $\overrightarrow{BD}$)