what in British history links these four countries? How does this help explain why people from these countries are among London's largest immigrant populations?

1.The majority of these are from outside Europe, often from countries with historical links to the UK. More than three million people - roughly a third of the immigrant population - come from Commonwealth countries such as India, Jamaica, Australia and Nigeria.

2.According to the United Nations, in 2019, the United States, Germany, and Saudi Arabia had the largest number of immigrants of any country, while Tuvalu, Saint Helena, and Tokelau had the lowest.

Explanation:

answer; /// i believe that the correct answer is (a) making presentations;

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.