The Hadoop API uses basic Java types such as LongWritable, Text, IntWritable. They have almost the same features as default java classes. What are these writable data types optimized for?

A.  Writable data types are specifically optimized for network transmissions
B.  Writable data types are specifically optimized for file system storage
C.  Writable data types are specifically optimized for map-reduce processing
D.  Writable data types are specifically optimized for data retrieval

Answer: A