In the short run, A seems like the best option because this would enable a quicker transition to the cloud which is the business Goal of cost optimization. In terms of cost, certification will cost the organisation more.
In the long run, B is the right option I would recommend as an architect. This would reduce the skill gap, increase proficiency and ensure repeatability. The organisation will incur more but will reap the reward... Except they have a bad culture and the staff resign right after getting the certification. Lol.