The following passage is taken from the article on Single-use plastic ban.

Beginning July 1, a ban on a slew of single-use plastic (SUP) products - identified to have low utility but high littering potential - became operational. This is in addition to the earlier ban on lightweight plastic bags (of thickness less than 75 microns) and non-woven plastic (less than 60 gm per sq m) that came into effect from September 1, 2021. (A) GoI has done a good job on the regulatory front by amending the Plastic Waste Management (PWM) Rules and ensuring robust extended producer responsibility (EPR) norms. (B) But the real test, as always, will be in implementation and ensuring compliance. Over the next six months, GoI should step up outreach, and keep track of implementation bottlenecks and compliance challenges. (C) Past efforts by states have been a mixed bag marked by patchy compliance. GoI must continue to work with state governments, local authorities, businesses and civil society to improve awareness, and address operational challenges.The development and use of alternatives must be prioritised. With the global agreement on plastics in the works, this will be a growth area that will provide opportunities. (D)

The following sentence has been taken from the passage. Which is the right place for the given sentence? Choose the alphabet to indicate the location.

Implementation and compliance are major challenges.