Which change is likely to have the greatest negative impact on financial risk?

Debt to tangible net worth decreases from $1$:$1$ to $0\mathrm{.}5$:$1$ in one year.

Debt to tangible net worth increases from $0\mathrm{.}5$:$1$ to $1\mathrm{.}5$:$1$ in three years.

Debt to tangible net worth increases from $1$:$1$ to $2$:$1$ in one year.