The answer is:  ________________________________________________    [D]:  "The chef chopped the carrots standing at the counter."_________________________________________________________The confusing issue is whether: 
__________________________________________________________
1) Was the chef standing at the counter WHILE s/he chopped the carrots? ; 
__________________________________________________________
or: 
__________________________________________________________
2)  Did the chef chop the carrots that happened to be at the counter (as opposed to some other carrots that were elsewhere)?   . ___________________________________________________________
        
             
        
        
        
The last one, plant and animals food sources both contain iron, but the iron in animal foods is more accessible to the body :)