Answer: is Option B.
B). Multi tasking: A person capability to carry out more than one task at the same time is called multitasking. Person performing more than one task at the same time is nearly impossible and it's hard for him to focus on each and every detail, thus leading to scatter attention among numbers of things at a time resulting in inaccuracy and greater numbers of fault in final result.
Explanation of other points:
A). Attention: is defined as performing tasks with special care and concentration.
C). Continuous partial attention: Under this category people perform tasks by concentrating on different sources to fetch information by only considering the most valid information among all information. people who use this technique to gather information works superficially concentrating on the relevant information out of numerous sources in a short period of thinking process.