At Agincourt, Charles D'Albret's battle plan was thwarted as a direct

At Agincourt, Charles D'Albret's battle plan was thwarted as a direct result of the irrepressible desire the French nobility had to charge headlong into any enemy offering a challenge.

This sentence indicates causal relationship, e.g. cause of someone's plan at agincourt was thwarted because of x reason. So usage of 'because' is preferred.

A. as a direct result of the irrepressible desire the French nobility had to - Modifier error, irrepressible desire should referred to The French and desire is incorrectly used as subject of causal clause.

B. because the French nobaility had an irrepressible desire to - Aha, perfect, elegant and meaningful sentence with correct verb usage. Correct

C. insofar as the French nobility desired to - incorrect usage of insofar against original sentence. Irrepressible word is removed.

D. because the French nobility would have an irrepressible desire to - Incorrect verb, would have, used, which distorts the meaning of the sentence.

E. by the French nobility's desire to irrepressibly - Nonsensicle meaning of the sentence because of usage of possessiveness of the noun, the french nobility's.

Imo. B

Answer E for being idiomatic and straight forward

NOTES: the plan was thwarted by the nobility or desire? can a desire thwart a plan? also, the plan was thwarted in the past, because of a desire that came before the plan, so we need "had".

Ans (B)

At Agincourt, Charles D'Albret's battle plan was thwarted as a direct result of the irrepressible desire the French nobility had to charge headlong into any enemy offering a challenge.
There's an actual battle.

A. as a direct result of the irrepressible desire the French nobility had to - WRONG. 'As a direct result' is wordy as there are better ways to say that.

B. because the French nobaility had an irrepressible desire to - CORRECT. French nobility had desire earlier because of which something happened and then Charles D'Albret's battle plan was thwarted.

C. insofar as the French nobility desired to - WRONG.

D. because the French nobility would have an irrepressible desire to - WRONG. Tense is not right.

E. by the French nobility's desire to irrepressibly - WRONG. Changes meaning as if the desire thwarted the plan.

IMO Answer B.

At Agincourt, Charles D'Albret's battle plan was thwarted as a direct result of the irrepressible desire the French nobility had to charge headlong into any enemy offering a challenge.

A. as a direct result of the irrepressible desire the French nobility had to -run on

B. because the French nobility had an irrepressible desire to -correct , was thwarted because the French 'had'

C. insofar as the French nobility desired to

D. because the French nobility would have an irrepressible desire to

E. by the French nobility's desire to irrepressibly --irrepressible 'desire' not irrepressibly 'charge'

Therefore,
B