What is displayed when the following code executes? var age = 19, score = 750; if ( age > = 21 & & score > = 700 ) { alert ("loan approved"); } else if ( age > = 21 & & score > = 650 ) { alert ("cosigner needed."); } else if ( age > = 18 & & score > = 680 ) { alert ("two cosigners needed."); } else { alert ("loan denied."); } a. loan approved. b. cosigner needed. c. two cosigners needed. d. loan denied.