A census is what this is called. A census (depending on the type and by who is conducting it) basically counts something like the number of people in the population so that whoever is using it can get accurate results for something. Like lets say a king wanted a census of his people, animals, soldiers. He would instantly have his men count all the people in the city. They would record the amount of animals. And the same for soldiers. Then they would put all this information in a big book and keep it in the palace. It was frequently updated as people moved or died.
The answer is number a is true
The three naval carriers would play and important role in other battles throughout the war.
The plan by the Japanese prior to the attack on Pearl Harbor was to perform a surprise-attack on the U.S. in which all of the U.S.'s major assets were destroyed; however, the several aircraft carriers that were not destroyed proved detrimental to the Japanese later on; their plan was based on crippling the U.S., but the U.S. was not entirely crippled.