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Mark the INCORR ECT option.
(A) if \( \vec{d}-\vec{e}=\vec{f} \) and \( f=d+e \) then \( \vec{d} \) and \( \vec{e} \) are opposite in direction.
\( \mathrm{P} \)
(B) if \( \overrightarrow{\mathrm{d}}+\overrightarrow{\mathrm{e}}=\overrightarrow{\mathrm{f}} \) and \( \mathrm{f}=\sqrt{2} \mathrm{~d} ; \mathrm{d}=\mathrm{e} \) then \( \overrightarrow{\mathrm{d}} \) and \( \overrightarrow{\mathrm{e}} \) are perpendicular
W
(C) if \( \vec{d}-\vec{e}=\vec{f} \) and \( f=d+e \) then \( \vec{d} \) and \( \vec{e} \) are in the same direction.
(D) if \( \overrightarrow{\mathrm{d}}+\overrightarrow{\mathrm{e}}=\overrightarrow{\mathrm{f}} \) and \( \mathrm{f}=\sqrt{2} \mathrm{~d} \); \( \mathrm{d}=\mathrm{e} \) then \( \overrightarrow{\mathrm{d}} \) and \( \overrightarrow{\mathrm{e}} \) are in opposite direction.
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