Step 1: Identify the finance manager's key observation in the case.
The finance manager noted that the stock market was bullish and therefore recommended raising funds through equity. A bullish market means rising share prices and positive investor sentiment.
Step 2: Understand the factor Cash Flow Position.
Cash flow position refers to a company's ability to generate sufficient cash to repay interest and principal on debt. This factor influences the debt vs. equity choice internally. The case does not mention cash flows.
Step 3: Understand the factor Flexibility.
Flexibility refers to a firm's ability to raise additional funds in the future without restricting its capacity to borrow or issue shares. This is not what the finance manager mentioned.
Step 4: Understand the factor Cost of Debt.
Cost of debt refers to the interest rate a company pays on borrowed funds. If debt is cheap, companies may prefer borrowing. Again, the case does not mention interest rates.
Step 5: Understand the factor Stock-Market Conditions.
When the stock market is bullish (optimistic, with rising prices), investors are eager to buy shares. This makes it easy for a company to raise large amounts of equity capital at favorable valuations. When the market is bearish, issuing equity becomes difficult.
Step 6: Match the case and confirm.
The finance manager explicitly observed that the market was bullish. The factor considered is Stock-Market Conditions.
\[ \boxed{ \text{(D) Stock-market conditions} } \]