The national insurance firm offers four tiers of coverage plans; buyers can choose among bronze, silver, gold, and platinum plans, there are no plans that offer greater coverage than the platinum tier or less than the bronze.
THE KEY TO THIS QUESTION STEM IS THAT WE NEED TO FOCUS MORE ON THE NON UNDERLINED PART.
THE UNDERLINED PART GIVES US FOUR OPTIONS OF MEDALS AND WE DON'T NEED TO FOCUS ON PARNELLISM BUT UNDERSTAND THE MEANING OF THE SENTENCE AND CHOOSE THE RIGHT CONJUNCTION.
(A) buyers can choose among bronze, silver, gold, and platinum plans, there are
THIS STATEMENT DOES NOT PROVIDE ANY CONJUNCTION, WHICH MAKES IT LOSES ITS MEANING. IT BASICALLY STATES THE FOUR PLANS BUT DOES NOT EMPHASIZES ON THE BEST PLAN WHICH CAN BE DONE THROUGH A CONJUNCTION.
(B) because buyers can choose bronze, silver, gold, or platinum, there are
BECAUSE IS USED USUALLY TO PROVIDE AN EXPLANATION. THE STATEMENT PROVIDES A LIST AND WE DONT NEED REASONS TO READ THIS LIST AS ITS NOT A CAUSE AND EFFECT QUESTION.
(C) however, buyers can choose among bronze, silver, gold, and platinum, and
WE DO HAVE A CONJUNCTION HERE BUT ITS PLACEMENT IS NOT CORRECT. IT WOULD HAVE MADE MORE SENSE IF "HOWEVER" WAS USED IN THE NEXT SENTENCE AFTER THE LIST WAS MENTIONED.
FOR EXAMPLE, " buyers can choose among bronze, silver, gold, and platinum plans, "HOWEVER" there are [/u]no plans that offer greater coverage than the platinum tier or less than the bronze.
THE PLACEMENT OF HOWEVER IS WRONG AND HENCE WE CAN ELIMINATE CHOICE C.
(D) buyers can choose among bronze, silver, gold, platinum plans, but
THIS SENTENCE DOES HAVE A CONJUNCTION, HOWEVER IT IS AWKWARD AND IT IS MISSING "THERE ARE". THUS WE CAN ELIMINATE D.
(E) although buyers can choose among bronze, silver, gold, and platinum plans, there are
THIS SENTENCE SOUNDS PERFECT. ALTHOUGH IS USED IN THE RIGHT PLACE. IT EXPLAINS THE MEANING OF THE SENTENCE CORRECTLY THAT ALTHOUGH THERE ARE 4 PLANS, THE BEST ONE IS XYZ.
THUS ANSWER E IS THE CORRECT CHOICE.