In this data set, what type of variable is Customer$\_$Number?

Obs Customer$\_$Number Last$\_$Name First$\_$Name Phone$\_$Number Postal$\_$Code

$101234$ Smith Lola $434-281-901224821$

$298702$ Jones $540-555-121224141$

$3.$ Whitman Stedman $301-907-389210278$

$467345$ Ramirez Julia $23518$

$538201$ Peters Jon $201-087-3467.$

Question $7$ options:

date

temporary

character

numeric

missing