What does the following code do$?$

logins $=$ "pwashing jhill tshah"

usernames $=$ logins$.$split$()$

Removes the last username in the logins variable and stores the string in the usernames variable

Splits a string variable called logins into a list of strings and stores it in the variable usernames

Splits a string variable called logins into single characters

Removes the blank spaces that split the usernames in the variable logins and stores the string in the variable usernames