I don't really know it but I think the answer is following
Answer:
by allowing them freedom of speech and expression
Answer:
Option: b) are examples of aids to manual calculating.
Explanation:
The tablets, abacuses, and manual tables were considered to use in the early period for manual calculating. Tablets from the Babylonians period and Rome became famously known for hand-abacus. Abacuses which we know today came into existence in China, a device to count larger numbers which were not possible with ten fingers in the early times.
Which professional most likely has a doctoral degree in order to work in their field? its c