Which of the following statements is false?

a. The collections from the java.util.concurrent package are specifically designed and optimized for sharing collections among multiple threads.
b. ConcurrentHashMap and ConcurrentLinkedQueue are by far the most frequently used concurrent collections.
c. The concurrent collections have been enhanced to support lambdas.
d. Rather than providing methods to support streams, the concurrent collections provide their own implementations of various stream-like operations—e.g., ConcurrentHashMap has methods forEach, reduce and search—that are designed and optimized for concurrent collections that are shared among threads.

b. ConcurrentHashMap and ConcurrentLinkedQueue are by far the most frequently used concurrent collections.