Frank is looking for his girlfriend in a large crowd of people. Because he is so focused on finding her, he fails to notice when a man in a clown costume walks by, despite looking directly at him. This is an example of:

a. a feature detection failure.

b. sensory overload.

c. sensory adaptation.

d. inattentional blindness.

D

Explanation:

"Also known as perceptual blindness, inattentive blindness results from a lack of attention that is not associated with vision defects or deficits, as an individual fails to perceive an unexpected stimulus in plain sight."- google

Basically when a person is focused on a task they unintentionally fail to notice other things.  

the aksumite empire was an ancient kingdom located in what is now northern ethiopia from the period of 100 ad to 940 ad. its capital was the city of aksum. the kingdom established itself as one of the 4 great powers at its time, along with persia, rome, and china.

the kingdom was rich in goods like gold, iron, and salt. it established strong commercial ties with the regions governed by rome, egypt, and persia (arabia). aksum was a key location in this commercial network. trade was also facilitated with the introduction of the aksumite currency.

all freedom fighters demanded for constitution. so british finally granted india it's freedom. then a constituent assembly was formed. it's chair man was rajendra prasad and its deputy chairman was dr. br ambedkar.

this assembly take the time of about one year than our constitution was finally formed.

explanation: