Pass by Value

When setting variables equal to each other and then changing one of them, does it change the other? Consider the following code. What is logged?

let a1 = {
  name: 'Johnny',
  hobby: 'football'
};

let b1 = 'Lisa prefers Johnny';

let c1 = ['Denny', 'Michelle', 'Chris R'];

let a2 = a1;
let b2 = b1;
let c2 = c1;

a2.hobby = 'roofsitting';
b2 = 'Lisa prefers Mark';
c2[2] = 'Doggy';

console.log(a1.hobby);
console.log(b1);
console.log(c1[2]);

Select one:

football, "Lisa prefers Johnny", Chris R

roofsitting, "Lisa prefers Mark", Doggy

roofsitting, "Lisa prefers Johnny", Doggy

football, "Lisa prefers Mark", Chris R