What are the teachings of christianity called

Which of the following statements is true about germany's use of u-boats?

Which of the following statements about this graph is accurate? world grain production has increased in every year since 1950. the amount of grain grown between 1950 and 1980 decreased. world grain production has generally increased between 1950 and 2010. more grain was grown in 1950 than in any other year.

How were japan's actions before and during world war 2 compare with germany's actions over the same period