Going for C
From 1) Only angles are given ...no info on radius ...can't calculate
From 2) can calculate the radius, but no info on angle inside the semicircle..can't calculate
Can calculate radius and then the arc..
BOE + COD = 2 BOE = 120
So angle EOD = 60
... so the arc (2 pi r) * (60 / 360)
but the diagram is not as per the information given..it will look good if we swap D and E...
Generally, these types of questions come with a statutory warning
... not as per the scale ...
By the way, the question will be good if it says BOE = COD = 120, answer will be same