Which are NOT good methods used in designing multithreaded programs $?$

create threads that need to communicate or synchronize frequently

create threads for parallel computations that depend on each other's data

put most computional work on one thread $($to benefit from processor affinity$)$ and create many threads for tasks that have to block frequently on I$/$O

allocate work to threads so that the need for synchronization between threads $($due to dependency and sharing$)$ is reduced