There were many hostile indians in the area
The immediate cause of World War One is the assassination of Archduke Franz Ferdinand and his wife on 28 June 1914. The heir to the throne of the Austro-Hungarian Empire, Archduke Franz Ferdinand and his wife Sophie in Sarajevo, shortly before the assault by Bosnian student Gavrilo Prinzip.
I believe the answer is A

Radium ( a radioactive element having atomic number 88 ) was discovered by Marie Sklodowska Curie in year 1898.
Answer:
true
Explanation:
i chose true because those two key ways mentioned in the question would make a team produce good results and make their work more presentable