Which excerpt from nathaniel hawthorne’s "dr. heidegger's experiment" best reveals the allegorical nature of this short story? select all that apply
a. a strange chillness, whether of the body or spirit they could not tell, was creeping gradually over them all.

b. they gazed at one another, and fancied that each fleeting moment snatched away a charm, and left a deepening furrow where none had been before.

c. the water of youth possessed merely a virtue more transient than that of wine.

d. "yes, friends, ye are old again," said dr. heidegger, "and lo! the water of youth is all lavished on the ground.

e. well, i bemoan it not; for if the fountain gushed at my very doorstep, i would not stoop to bathe my lips in it; no, though its delirium were for years instead of moments. such is the lesson ye have taught me! "

f. but the doctor's four friends had taught no such lesson to themselves.

g. they resolved forthwith to make a pilgrimage to florida, and quaff at morning, noon, and night, from the fountain of youth.