The angle between the two vectors $\overrightarrow{\mathrm{A}}=5\widehat{\mathrm{i}}+5\widehat{\mathrm{j}}\mathrm{and}\overrightarrow{\mathrm{B}}=5\widehat{\mathrm{i}}-5\widehat{\mathrm{j}}$ will be

• A

  Zero

• B

  ${45}^0$

• C

  ${90}^0$

• D

  ${180}^0$