Which is NOT considered a data structure?

A$.$ "Jennifer Lopez"

B$.\{"$fn$"$: "Jennifer", $"$ln$"$: "Lopez" $\}$

C$.\{$ "Jennifer", "Lopez" $\}$

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Data Structure and Algorithm $$ Penn P$.$ Wu$,$ PhD$.($Fall $2024$ version$)$

D$.$ string fn$,$ ln; fn $=$ "Jennifer"; ln $=$ "Lopez";

E$.$ All of the options are data structure of some form

$3.$ Which is not a "primitive data type" in C$++?$

A$.$ int

B$.$ array

C$.$ float

D$.$ char

E$.$ bool

$4.$ Given the following code segment, which is consider a data item?

struct Student