For the code shown below, the line numbers are added for your reference:

$1$ def maybeAdd$($a $,$b $)$:

$2$ for let in b:

$3.$ if let not in a:

$4$ a$.$append$($let$)$

After the code above runs, what can we conclude?

b will have more elements than a

no correct answer is shown

a and b will two lists with the same length

a and b will two lists with the same elements