Answer:
The correct answer is A: Frederick II of Prussia.
Step-by-step explanation:
The War of the Austrian Succession began in 1740 when Frederic II of Prussia invaded a Habsburg province of Silesia, ruled by Maria-Theresa.
Frederic II of Prussia invaded Maria-Theresa under the pretext that she could not inherit the Habsburg throne from her father since the Salic law strictly forbade women to inherit the throne.
The war ended after signing the Treaty of Aix-la-Chapelle in 1748. Maria-Theresa was named as Archduchess of Austria and Queen of Hungary.