Emergence of multicore systems has put greater emphasis on developing novel techniques for concurrency problems, because A) some fundamentally new concurrency problems have arisen that cannot be solved using traditional techniques such as mutex locks, semaphores, and monitors. B) race conditions are much more difficult to solve in multicore systems. C) deadlocks are much more difficult to prevent or avoid in multicore systems. D) with increased number of processing cores, there is an increased risk of race conditions and deadlocks. the solution for bounded buffer problem using JAVA monitors, functions insert() and remove() are synchronized to ensure that A) a thread may insert an item and different thread may remove an item from a different location in the buffer simultaneously. B) at most one thread may enter or remove an item at any time. C) at most one thread may enter an item at any time, but multiple threads may remove items from different locations at the same time. D) multiple thread may enter items at different locations at the same time, but at most one thread may remove an item at the same time.