Given the C code below, which C statement is legal?

struct person $\{$

$$ struct $\{$

$$ float height, weight;

$$ int age;

$$ char $*$name;

$\}$ b;

$$ union $\{$

$$ struct $\{$

$$ int grade, room;

$\}$ teacher;

$$ float gpa;

$\}$ u;

$$ enum $\{$TCHR$,$ STDNT$\}$ kind;

$\}$ p;

Group of answer choices

p$.$u$.$kind $=$ TCHR;

p$.$height $=50\mathrm{.}5$f;

None of the other answers are legal.

p$.$u$.$teacher.room $=5$;

p$.$b$.$gpa $=3\mathrm{.}4$f;