Consider the following program in some unknown language.$$ In this language, the $+$ operator $($plus$)$ means addition and the $.$ operator $($dot$)$ means concatenation.$$

i $=10$

j $="$i$3"$

k $=$ i $.$ j

print k

What is printed if we consider strong typing?$$

Group of answer choices

blank

$13$

$"10$i$3"$

throws an error

$"$i$3"$

$10$