The total production of fertilizers in the year 1998 and 2000 is X% of the total production in the years 1997 and 1999. Then X is equal to

• A. <table><tr><td rowspan="2"> 103 </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"></td></tr><td align="center">3</td></table>
• B. <table><tr><td rowspan="2"> 79</td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>7</center></td><td rowspan="2"></td></tr><td align="center">17</td></table>
• C. <table><tr><td rowspan="2"> 96</td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>24</center></td><td rowspan="2"></td></tr><td align="center">31</td></table>
• D. <table><tr><td rowspan="2"> 125</td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>25</center></td><td rowspan="2"></td></tr><td align="center">27</td></table>