10.      :  <br><br>a = " ";<br>trace("a = " + a);<br>a.r = 5;<br>   trace("a.r = " + a.r);<br>trace("(a instanceof String) = " + (a instanceof String) + "
");<br>  a = Object(a);<br>trace("a = " + a);<br>a.r = 5;<br>trace("a.r = " + a.r);<br>trace("(a instanceof String) = " + (a instanceof String));
A) a =  <br>a.r =<br>(a instanceof String) = false<br>a =  <br>a.r = 15<br>(a instanceof String) = true*0
B) a =  <br>a.r =<br>(a instanceof String) = false<br>a =  <br>a.r = 5<br>(a instanceof String) = true*10
C) a =  <br>a.r =<br>(a instanceof String) = true<br>a =  <br>a.r = 5<br>(a instanceof String) = true*0
D) a =  <br>a.r =<br>(a instanceof String) = false<br>a =  <br>a.r = 5<br>(a instanceof String) = false*0
E) x =  <br>a.r =<br>(a instanceof String) = false<br>a =  <br>a.r = 5<br>(a instanceof String) = true*0
