What will be displayed in the user's browser after the following code executes if the user enters 87 at the prompt? "use strict"
var getInfo = function() {
grade = parseInt(prompt("What's your score on the test?"));
var newGrade = getResult(grade);
alert("Your grade, curved, is " + newGrade);
};

var getResult = function(grade) {
var newGrade = grade + 5;
return (newGrade);
};

a. an alert will display: Your grade, curved, is 92
b. an alert will display: Your grade, curved, is NaN
c. nothing will display; grade is an undeclared variable
d. nothing will display; newGrade cannot be declared twice