The best thing to do when going out with someone new is to.

(B) median only

Step-by-step explanation:

The given data set is:

{37, 39, 38, 78, 36}  

We have to find the best measure of centre.

Since, from the given set, we can see that there is an outlier 78 due to which the best measure of centre cannot be determined by mean.

Also, mode is the data point which occurs frequently in the data set, thus mode cannot be use to determine the best measure of centre.

Median is the middle value of the given data set, thus median can be used to determine the best measure of centre.