With his death last night, the entire nation has lost someone
like a father, and it will be a long and hard time before the great gap that he has left in our national life can be filled.
A.
like a father, and it will be a long and hard time -
Wrong comparison. Shows that the entire nation has lost someone while being in the capacity of a fatherB.
like a father, and it will be a long, hard time -
Same error as AC.
who was like a father
and it will be a long hard time -
The comparison is fine now. Showing that the nation has lost someone and that someone was like a father. But, it has Parallelism issue with 'and', what does the pronoun 'it' refers to?D.
like a father, and it will be a long and a hard time -
Same error as AE.
who was like a father
, and it will be a long and hard time -
Correct comparison. Showing that the nation has lost someone and that someone was like a father. Also, now the two independent clause are connected properly using ",and"(E)