Four parts of the grammatically incorrect sentence are given as options below, find the part of the sentence which is grammatically incorrect?
A
Having always been an early riser,

B
waking up early and

C
going for a jog

D
has always been very important to me

Answer provided is D..the reason stated was that as there are two actions being described, we need to use have.But if both actions are considered as a single idea and one complete action, isn't 'has' correct?
the sentence could be re framed as Being an early riser, waking up early and going for a jog has always been very important to me. Is there anything wrong in this construction?