The correct answer would be C-intervention.
The Elementary Education Act of 1870 was the first of a number of acts of parliament passed between 1870 and 1893 to create compulsory education in England and Wales for children aged between five and 13. It was known as The Forster Act after its sponsor William Forster.
Awnser and Explanation:
The telegram was considered perhaps Britain's greatest intelligence coup of World War I and, coupled with American outrage over Germany's resumption of unrestricted submarine warfare, was the tipping point persuading the U.S. to join the war.