Both changes shift AD rightward Steps:

• Private sector investment rises, increasing a component of AD (I), shifting AD right.
• Government spending on training rises, increasing another AD component (G), shifting AD further right.
• AS remains unchanged, as neither affects production capacity directly.
• New equilibrium occurs at intersection of new AD and original AS: higher output and price level.

Why B is correct:

• B shows rightward AD shift, raising equilibrium output and prices per AD-AS model.

Why the others are wrong:

• A likely shows leftward AD shift, which would lower output and prices.
• C probably depicts AS shift, but no supply-side changes occur.
• D indicates no shift, ignoring the demand increases.

Final answer: B