Answer:
b. a debit to Held-to-Maturity Debt Investments for $26,000
Explanation:
Investment in corporate bonds is considered as Held-to-Maturity Debt investments.
Date      Accounts Title and Explanation         Debit    Credit
30 Mar 18  Held-to-Maturity Debt investments      $26,000
          [$25,000 + $1,000)
              Cash                                   $26,000
         (To record an investment in bonds)
Therefore, in the journal entry, it is debited to Held-to-Maturity Debt investments for $26,000