How Does Economic Integration (E

How does economic integration (e.g. the combining of two economies into one) impact the cost of innovation curve (COI) when there is also a concurrent geographic clustering (agglomeration) of R&D activity in one country?

A) the cost of innovation curve shift up (to the left) and becomes steeper.
B) The cost of innovation curve shifts up (to the left) and become flatter.
C) The cost of innovation curve shifts down (to the right) and becomes steeper.
D) The cost of innovation curve shifts down (to the right) and becomes flatter.