What does an inverted yield curve imply the most? $($i$.$e$.10y-3m$ spread is negative$)$

A$)$ Long$-$term investors are buying long$-$term treasuries, expecting slower economic growth

B$.$ Long$-$term investors accept lower bond prices, and economy is likely to face stagnant growth or recession

C$)$ Long$-$term investors try to seek for short$-$term liquidity premium and sell long$-$term treasuries

D$)$ Short$-$term inflation expectation has waned

You want to construct the following payoff using options. Which combination of options yield the following? Ignore premium. All calls have the same expiration date.

A$)$ long $1$ put at $90,$ long $1$ call at $110$

B$)$ long $2$ call at $90,$ short $1$ call at $100,$ long $2$ call at $110$

C$.$ long $1$ call at $90,$ short $2$ call at $100,$ long $1$ call at $110$

D$)$ short $1$ call at $90,$ long $1$ call at $100,$ short $1$ call at $110$

You invest in the stock of Valleyview Corporation and purchase a put option on Valleyview Corporation. This strategy is called a $q,.$

A$)$ long straddle

B$)$ naked put

$($C$)$ protective puts

D$)$ short stroll