Please tell me the way you thought of -----the garden.A take care of B to take of C taking care of

不必纠结.把你的句子分成两句就容易理解了：
1 Please tell me the way TO take care of the garden.
2 You thought of the way TO take care of the garden.
再把这两句合并起来,把2中的the way TO take care of the garden省略,用that替换,放在1 的way後面,再把2的剩下部分写在後面,如下：
.--------- Please tell me the way （that）you thought of TO take care of the garden..
括号中的that可以省略,在高考英语中通常作为考点而省略.
d 不对.如果一定要选择D 为正确答案,你的句子必须是：
Please tell me the way （that）you thought of OF HOW to take care of the garden..
(注意：必须有两个 of )
---------- 原始结构：1 Please tell me the way .
2 you thought of the way of how to take care of the garden
the way of how to do sth 语法正确,但太Chinglish了.