Question $20$

What does the JavaScript expression

document.getElementById$("$numberOfParticipants$").$value $=0$; do$?$

O a$.$ results in an error because of incorrect syntax

O b$.$ sets the value of the input control with the id "numberOfParticipants" to $0$

O c$.$ returns a Boolean true if the value of the input control with the id "numberOfParticipants" is $0$ O d$.$ retrieves the value entered by the user for the input control with the id "numberOfParticipants"