求解释OG 17阅读的疑惑 感谢！

CathyGYM

1. 某一篇讲1970's - 1980's

Acquisitions may well have the desirable effect of channeling a nation's resources efficiently from less to more efficient sectors of its economy, but the individual acquisitions executives arranging these deals must see them as advancing either their own or their companies' private economic interests. It seems that factors having little to do with corporate economic interests explain acquisitions. These factors may include the incentive compensation of executives, lack of monitoring by boards of directors, and managerial error in estimating the value of firms targeted for acquisition. Alternatively, the acquisition acts of bidders may derive from modeling: a manager does what other managers do.
alternatively前举例了几个解释公司收购合并的原因，不太明白最后alternatively之后想表达什么意思？


2. 某一篇讲micro-wear patterns可以作为动物diets的证据

某题的E.
They lacked the micro-wear characteristics distinctive of modern frugivores.

不太明白意思.