Scientists at the Los Alamos National Laboratory have

Question

36. Scientists at the Los Alamos National Laboratory have succeeded for the first time in mining heat from the Earth’s interior  and producing energy on a commercial scale, enough for efficient generation of electricity and heating  factories and homes.

A. and producing energy on a commercial scale, enough for efficient generation of electricity and heating
B. and producing enough energy on a commercial scale for electricity to be generated efficiently and to heat
C. for energy production on a commercial scale, enough for generating electricity efficiently and to heat
D. to produce energy on a commercial scale, enough for generating electricity efficiently and for heating
E. to produce enough energy on a commercial scale for efficient generation of electricity and heat

bhatiagp · Answer

D looks best. Its parallel and it implies the correct meaning that the mining is done to produce enough electricity.

Paul · Answer

Agree with D being best for ll in the second half portion

prasannar · Answer

D for me too. A comes close but modifies the meaning thus A is out.

pmenon · Answer

i went for D as well. It conveys the proper meaning (the scientists didnt generate heat on a commercial scale), and maintains parallelism.

sondenso · Answer

Thanks, OA is D

Can you say something about E?

bsd_lover · Answer

D for me.

+1 for great question.
This is a mess of misplaced modifiers and diction. What is heating the homes ? what is producing the heat ? I had to read it a few times to "get" the meaning. But once I understood the meaning, the question was easy to solve.

I interpret it as Scientists mined heat to produce energy --> which will heat factories and homes (and be efficient enough to do so).
Based on this interpretation, I can't look beyond D.

mymba99 · Answer

Something of A and B = Something of A and something of B.
here, efficient generation of electricity and heat factories = efficient generation of electricity 
 And efficient generation of  heat factories  That sounds funny.

Scientists at the Los Alamos National Laboratory have

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards