Given the code below, which of the following loops will continue to accept yalues for the variable age, and print them out, as long as the value entered is greater than zero? int age $=0$;

a$.$ coul $$ "Enter an age greater than zero" : cin $$ age;

do $//$begin loop

$1$

cout $$ "The age entered was $"$ age $$ endl $$ endl;

cout $$ "Enter an age greater than zero $"$ cin $$ age;

while $($age $>0)$:

b$.$ cout $$ "Enter an age greater than zero $",$ cin $$ age;

while $($age $<mn>0</mn><mtext></mtext><mi>)</mi><mtext></mtext><mi>/</mi><mi>/</mi>$begin loop

r

cout $$ The age entered was. $"$ age $$ endl $$ endl;

cout $$ "Enter an age greater than zero:";

cin $$ age;

c$.$ for $\frac{i}{\frac{?}{?}}=0$;$i<mn>1</mn><mn>0</mn>$;$i++$ begin loop

$\}$

cout $$ "Enter an age greater than zero:"; cin $$ age;

cout $$ "The age entered was: $"$ age $$ endl $$ endl; $)$

d$.$ do $//$begin loop

$($ cout $$ "The age entered was $"$ age $$ endl $$ endl; cout $$ "Enter an age greater than zero" : cin $$ age: